Effective approach in preventing pulmonary embolism is to prevent

Correct option is B

Ans. (b) Deep Vein Thrombosis
Sol. Pulmonary embolism (PE) is most often caused by a clot that forms in a deep vein (usually in the legs) and travels to the lungs. Hence, preventing DVT is the most effective strategy to avoid PE.
Explanation of each option:
· (a) Heart Disease – Increases general risk but is not a direct cause of PE.
· (b) Deep Vein Thrombosis – Correct. Primary source of emboli that cause PE.
· (c) Chronic Obstructive Pulmonary Disease – Affects lung function but not directly linked to PE.
· (d) Diabetes Mellitus – A risk factor for many conditions, but not a direct cause of pulmonary embolism.